Resource Type

Journal Article 1648

Conference Videos 22

Conference Information 1

Year

2024 2

2023 123

2022 140

2021 122

2020 127

2019 83

2018 82

2017 79

2016 79

2015 87

2014 68

2013 64

2012 54

2011 55

2010 65

2009 64

2008 68

2007 69

2006 54

2005 32

open ︾

Keywords

numerical simulation 16

model 15

model test 15

mathematical model 14

China 10

kinetic model 10

COVID-19 9

different 8

Deep learning 7

artificial intelligence 7

optimization 7

sensitivity analysis 7

simulation 7

sustainable development 7

Machine learning 6

uncertainty 6

constitutive model 5

development 5

remote sensing 5

open ︾

Search scope:

排序： Display mode:

Comparison between linear and non-linear forms of pseudo-first-order and pseudo-second-order adsorption

Junxiong LIN , Lan WANG ,

Frontiers of Environmental Science & Engineering 2009, Volume 3, Issue 3,   Pages 320-324 doi: 10.1007/s11783-009-0030-7

Abstract: The best-fit equations of linear and non-linear forms of the two widely used kinetic models, namely pseudo-first-orderThe results show that the non-linear forms of pseudo-first-order and pseudo-second-order models weremore suitable than the linear forms for fitting the experimental data.thus, the non-linear forms of kinetic equations should be primarily used to obtain the adsorption parametersIn addition, the Δ(%) method for error analysis may be better to determine the best-fitting model

Keywords： adsorption     pseudo-first order     pseudo-second order     kinetic model     linear method     non-linear method    

HTML PDF Collect

Performance analysis of two EM-based measurement bias estimation processes for tracking systems None

Zhi-hua LU, Meng-yao ZHU, Qing-wei YE, Yu ZHOU

Frontiers of Information Technology & Electronic Engineering 2018, Volume 19, Issue 9,   Pages 1151-1165 doi: 10.1631/FITEE.1800214

Abstract: estimation processes to estimate the measurement bias which is formulated as a random variable in one state-spacemodel and a constant value in another.bias estimation and reveal the link between the two proposed EM estimation processes in the respective state-spaceIt is found that the bias estimate in the second state-space model is more accurate and of less complexityFurthermore, the EM-based iterative estimation converges faster in the second state-space model than

Keywords： Non-linear state-space model     Measurement bias     Extended Kalman filter     Extended Kalman smoothing     Expectation-maximization    

HTML PDF Collect

Recent development of vibration utilization engineering

WEN Bangchun

Frontiers of Mechanical Engineering 2008, Volume 3, Issue 1,   Pages 1-9 doi: 10.1007/s11465-008-0017-2

Abstract: In this paper, vibration utilization is classified into linear or non-linear vibrations, waves, and electric-magnetic

Keywords： utilization engineering     non-linear     vibration     vibration utillization     utillization engineering    

HTML PDF Collect

Research on the railway construction process quality model based on the state-space method

Lu Shoudong,Zhou Guohua,Chen Haifeng and Zhao Guotang

Strategic Study of CAE 2014, Volume 16, Issue 3,   Pages 64-69

Abstract:

In the ISO9000“input- output”process model，the concept of process quality is difficultpaper puts forward the scientific meaning of the concept of process quality and the process quality model

Keywords： railway construction project     “white box”model     state transition equation     process quality    

HTML PDF Collect

Linear and nonlinear elastic analysis of closely spaced strip foundations using Pasternak model

Priyanka GHOSH, S. RAJESH, J. SAI CHAND

Frontiers of Structural and Civil Engineering 2017, Volume 11, Issue 2,   Pages 228-243 doi: 10.1007/s11709-016-0370-x

Abstract: attempt is made to determine the interaction effect of two closely spaced strip footings using Pasternak modelThe study considers small strain problem and has been performed using linear as well as nonlinear elasticThe linear elastic analysis has been carried out by deriving the equations for the interference effectof the footings in the framework of Pasternak model equation; whereas, the nonlinear elastic analysisResults obtained from the linear and the nonlinear elastic analysis are presented in terms of non-dimensional

Keywords： bearing capacity     linear and non-linear elasticity     foundation     interaction effect     numerical modeling     Pasternakmodel    

HTML PDF Collect

Research on structural health monitoring (SHM) system based on RTK GPS system

Wang Renpeng,Yao Lianbi,Meng Xiaolin

Strategic Study of CAE 2011, Volume 13, Issue 3,   Pages 63-70

Abstract: coordinate time series were treated as the multi-outputs of the dynamic system and used to build the statespace model and ARMA model and spectrum estimations for the response.completed when the bridge was opened in 1990 and results that forecasted by fine finite element (FE) modelThe research illustrated that the state-space model and ARMA model were efficient tools for evaluation

Keywords： RTK GPS system     time series     state-space model     ARMA model     finite element model    

HTML PDF Collect

Scrutiny of non-linear differential equations Euler-Bernoulli beam with large rotational deviation by

M. R. AKBARI,M. NIMAFAR,D. D. GANJI,M. M. AKBARZADE

Frontiers of Mechanical Engineering 2014, Volume 9, Issue 4,   Pages 402-408 doi: 10.1007/s11465-014-0316-8

Abstract:

The kinematic assumptions upon which the Euler-Bernoulli beam theory is founded allow it to be extended to more advanced analysis. Simple superposition allows for three-dimensional transverse loading. Using alternative constitutive equations can allow for viscoelastic or plastic beam deformation. Euler-Bernoulli beam theory can also be extended to the analysis of curved beams, beam buckling, composite beams and geometrically nonlinear beam deflection. In this study, solving the nonlinear differential equation governing the calculation of the large rotation deviation of the beam (or column) has been discussed. Previously to calculate the rotational deviation of the beam, the assumption is made that the angular deviation of the beam is small. By considering the small slope in the linearization of the governing differential equation, the solving is easy. The result of this simplification in some cases will lead to an excessive error. In this paper nonlinear differential equations governing on this system are solved analytically by Akbari-Ganji’s method (AGM). Moreover, in AGM by solving a set of algebraic equations, complicated nonlinear equations can easily be solved and without any mathematical operations such as integration solving. The solution of the problem can be obtained very simply and easily. Furthermore, to enhance the accuracy of the results, the Taylor expansion is not needed in most cases via AGM manner. Also, comparisons are made between AGM and numerical method (Runge-Kutta 4th). The results reveal that this method is very effective and simple, and can be applied for other nonlinear problems.

Keywords： AGM     critical load of columns     large deformations of beam     nonlinear differential equation    

HTML PDF Collect

Chaotic behavior of LNG after stratification in main stream region of storage tank

WANG Jingjing, MA Xiaoqian

Frontiers in Energy 2008, Volume 2, Issue 4,   Pages 514-518 doi: 10.1007/s11708-008-0076-4

Abstract: Based on non-linear dynamics, a 2-dimensional Rayleigh-Benard convection model was developed to simulate

Keywords： Runge-Kutta     non-linear     corresponding     temperature     addition    

HTML PDF Collect

Spatial distribution of ecological security status assessment of West-Liaohe River based on geographic information system

WANG Geng, WU Wei

Frontiers of Environmental Science & Engineering 2007, Volume 1, Issue 4,   Pages 471-476 doi: 10.1007/s11783-007-0075-4

Abstract: is a hot research area in resource and environmental science, which involves data with much spatial, non-linear

Keywords： environmental     Eco-security assessment     resource     Geographic information     non-linear    

HTML PDF Collect

Optimal localization of complex surfaces in CAD-based inspection

XU Jinting, LIU Weijun, SUN Yuwen

Frontiers of Mechanical Engineering 2008, Volume 3, Issue 4,   Pages 426-433 doi: 10.1007/s11465-008-0068-4

Abstract: Since this approach does not involve an iterative process of solving non-linear equations for the closest

Keywords： deviation     comparison     non-linear     localization     inspection    

HTML PDF Collect

Shape optimization of aluminium alloy spherical reticulated shells considering nonlinearities

Wei LIU; Lishu XU; Shaojun ZHU; Lijuan LI; Feng LIU; Zhe XIONG

Frontiers of Structural and Civil Engineering 2022, Volume 16, Issue 12,   Pages 1565-1580 doi: 10.1007/s11709-022-0867-4

Abstract: The optimization procedure adopts a genetic algorithm in which the elastoplastic non-linear bucklingcontrolling points, optimization results have enabled a path toward achieving a larger elastoplastic non-linearmaterial nonlinearity, the optimal shapes obtained based on considering and not considering material non-linearobjective functions, the elastoplastic and elastic non-linear buckling loads, are compared.

Keywords： shape optimization     aluminum alloy     spherical reticulated shell     non-linear buckling     material nonlinearity    

HTML PDF Collect

Research and assessment of high efficiency temporary plugging agent used for refracturing

Yan Zhitao

Strategic Study of CAE 2012, Volume 14, Issue 4,   Pages 20-25

Abstract: And, nonlinear finite element numerical simulation analysis has been adopted for temporarily blocking

Keywords： refracturing     temporary plugging agent     fracture divert     non-linear finite element analysis     gas protection    

HTML PDF Collect

Integrated control strategies for railway vehicles with independently-driven wheel motors

FENG Jinzhi, LI Jun, Goodall R. M.

Frontiers of Mechanical Engineering 2008, Volume 3, Issue 3,   Pages 239-250 doi: 10.1007/s11465-008-0053-y

Abstract: First, a non-linear vehicle dynamic model and motor drive strategy are presented, which are followed

Keywords： development     independently-driven     non-linear     stabilization     reformulated    

HTML PDF Collect

Seismic progressive-failure analysis of tall steel structures under beam-removal scenarios

Behrouz BEHNAM, Fahimeh SHOJAEI, Hamid Reza RONAGH

Frontiers of Structural and Civil Engineering 2019, Volume 13, Issue 4,   Pages 904-917 doi: 10.1007/s11709-019-0525-7

Abstract: Investigating progressive collapse of tall structures under beam removal scenarios after earthquake is a complex subject because the earthquake damage acts as an initial condition for the subsequent scenario. An investigation is performed here on a 10 story steel moment resisting structure designed to meet the life safety level of performance when different beam removal scenarios after earthquake are considered. To this end, the structure is first subjected to the design earthquake simulated by Tabas earthquake acceleration. The beam removal scenarios are then considered at different locations assuming that both ends connections of the beam to columns are simultaneously detached from the columns; thus the removed beam falls on the underneath floor with an impact. This imposes considerable loads to the structure leading to a progressive collapse in all the scenarios considered. The results also show that the upper stories are much more vulnerable under such scenarios than the lower stories. Hence, more attention shall be paid to the beam-to-column connections of the upper stories during the process of design and construction.

Keywords： progressive collapse     tall steel moment-resisting frames     non-linear dynamic analysis     beam-removal scenario    

HTML PDF Collect

FULL TIME-SPACE GOVERNANCE STRATEGY AND TECHNOLOGY FOR CROPLAND NON-POINT POLLUTION CONTROL IN CHINA

Frontiers of Agricultural Science and Engineering 2023, Volume 10, Issue 4,   Pages 593-606 doi: 10.15302/J-FASE-2023522

Abstract:

Ensuring food safety while reducing agricultural non-point source pollution is quite challenging,Effective systematic strategies and comprehensive technologies need to be developed for agricultural non-pointIn this review, a proposal is made for a full time-space governance strategy that prioritizes sourceThe 4R chain technology system with the full time-space governance strategy was applied at the scaleof an administrative village and proved to be a feasible solution for reducing agricultural non-point

Keywords： 4R chain technology system     agricultural non-point source pollution     case study     full time-space governance    

HTML PDF Collect

Title Author Date Type Operation

Comparison between linear and non-linear forms of pseudo-first-order and pseudo-second-order adsorption

Junxiong LIN , Lan WANG ,

Journal Article

Performance analysis of two EM-based measurement bias estimation processes for tracking systems

Zhi-hua LU, Meng-yao ZHU, Qing-wei YE, Yu ZHOU

Journal Article

Recent development of vibration utilization engineering

WEN Bangchun

Journal Article

Research on the railway construction process quality model based on the state-space method

Lu Shoudong,Zhou Guohua,Chen Haifeng and Zhao Guotang

Journal Article

Linear and nonlinear elastic analysis of closely spaced strip foundations using Pasternak model

Priyanka GHOSH, S. RAJESH, J. SAI CHAND

Journal Article

Research on structural health monitoring (SHM) system based on RTK GPS system

Wang Renpeng,Yao Lianbi,Meng Xiaolin

Journal Article

Scrutiny of non-linear differential equations Euler-Bernoulli beam with large rotational deviation by

M. R. AKBARI,M. NIMAFAR,D. D. GANJI,M. M. AKBARZADE

Journal Article

Chaotic behavior of LNG after stratification in main stream region of storage tank

WANG Jingjing, MA Xiaoqian

Journal Article

Spatial distribution of ecological security status assessment of West-Liaohe River based on geographic information system

WANG Geng, WU Wei

Journal Article

Optimal localization of complex surfaces in CAD-based inspection

XU Jinting, LIU Weijun, SUN Yuwen

Journal Article

Shape optimization of aluminium alloy spherical reticulated shells considering nonlinearities

Wei LIU; Lishu XU; Shaojun ZHU; Lijuan LI; Feng LIU; Zhe XIONG

Journal Article

Research and assessment of high efficiency temporary plugging agent used for refracturing

Yan Zhitao

Journal Article

Integrated control strategies for railway vehicles with independently-driven wheel motors

FENG Jinzhi, LI Jun, Goodall R. M.

Journal Article

Seismic progressive-failure analysis of tall steel structures under beam-removal scenarios

Behrouz BEHNAM, Fahimeh SHOJAEI, Hamid Reza RONAGH

Journal Article

FULL TIME-SPACE GOVERNANCE STRATEGY AND TECHNOLOGY FOR CROPLAND NON-POINT POLLUTION CONTROL IN CHINA

Journal Article